突发！美国宣布：制裁！特朗普，发出最后通牒！

Core Viewpoint - The article discusses the recent escalation of tensions between the United States and Iran, highlighting new sanctions imposed by the U.S. and the response from Iranian officials, indicating a potential for conflict if negotiations do not occur under fair conditions [1][2][3][4]. Summary by Sections U.S. Sanctions - On January 30, the U.S. Treasury announced new sanctions against Iran, targeting Interior Minister Iskander Momeni and several senior officials of the Islamic Revolutionary Guard Corps (IRGC) [1][2]. - The sanctions list was updated to include 7 individuals and 2 entities, with notable figures such as IRGC intelligence commander Majid Khadami [2]. - The European Union also announced sanctions against 15 Iranian officials and 6 entities, including asset freezes and visa restrictions [2]. U.S. Military Threats - President Trump issued a final ultimatum to Iran regarding negotiations, stating that he had communicated a deadline for reaching an agreement [3]. - Trump emphasized the presence of a powerful U.S. naval fleet in the region, suggesting military action could be a possibility if negotiations fail [3][4]. Iranian Response - Iranian Foreign Minister Zarif stated that Iran would not negotiate under U.S. threats and insisted that any talks must be based on fairness and equality [1][4]. - Zarif also indicated that Iran is prepared for both negotiations and military readiness, asserting that their military preparedness is at a high level [4]. Diplomatic Developments - Iranian security chief Ali Larijani made an unannounced visit to Moscow amid rising tensions, discussing important regional and international issues with Russian President Vladimir Putin [4]. - The Kremlin's involvement suggests a potential mediation role between Washington and Tehran [4]. Regional Security Concerns - Israeli airlines have implemented emergency measures in response to the escalating situation, including flight restrictions and potential aircraft relocations [5]. - Iranian officials warned that any hostile actions would be met with proportional responses, including potential strikes against Israel [5].